1 Introduction

These are prliminary regressions that compare bluefish catch, abundance, recruitment, and F to various indicators.

2 Regression analysis

2.2 Physical indicators

2.2.1 Cold pool index

Figures

Regression statistics

[1] “No statistically significant results”

2.2.2 Warm core rings

Figures

Regression statistics

Fmort vs Warm Core Rings n
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.51 0.05 10.49 0
Val -0.01 0.00 -3.47 0
Name Value
F-statistic 12.06
df 1, 32
R2 0.27
R2-adj 0.25

2.2.3 Marine heatwave index

Figures

Regression statistics

Recruitment vs cumulative intensity degrees C
Estimate Std. Error t value Pr(>|t|)
(Intercept) 52315.63 3391.65 15.42 0.00
Val -42.06 19.35 -2.17 0.04
Name Value
F-statistic 4.73
df 1, 28
R2 0.14
R2-adj 0.11
Recruitment vs maximum intensity degrees C
Estimate Std. Error t value Pr(>|t|)
(Intercept) 84882.20 17174.51 4.94 0.00
Val -16430.84 7433.42 -2.21 0.04
Name Value
F-statistic 4.89
df 1, 28
R2 0.15
R2-adj 0.12

2.2.4 GLORYS bottom temperature

Figures

Regression statistics

[1] “No statistically significant results”

2.2.5 Long-term sea surface temperature

Figures

Regression statistics

[1] “No statistically significant results”

2.2.6 Sea surface temperature anomaly

Figures

Regression statistics

[1] “No statistically significant results”

2.2.7 Spring offshore bottom temperature

Bluefish are typically found offshore in the spring.

2.2.8 Fall onshore bottom temperature

Bluefish are typically found onshore in the fall.

2.2.9 Stratification

Figures

Regression statistics

[1] “No statistically significant results”

2.2.10 Winter wind speed

Figures

Regression statistics

Fmort vs tke winter J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.79 0.14 5.65 0
Val -0.62 0.20 -3.17 0
Name Value
F-statistic 10.04
df 1, 32
R2 0.24
R2-adj 0.21
Abundance vs total wind speed winter J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 45313.88 22718.38 1.99 0.05
Val 19019.50 7099.74 2.68 0.01
Name Value
F-statistic 7.18
df 1, 32
R2 0.18
R2-adj 0.16

2.2.11 Spring wind speed

Figures

Regression statistics

Fmort vs tke spring J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.70 0.17 4.10 0.00
Val -1.02 0.50 -2.06 0.05
Name Value
F-statistic 4.23
df 1, 32
R2 0.12
R2-adj 0.09

2.2.12 Summer wind speed

Figures

Regression statistics

Catch vs hcly summer m2/sec2
Estimate Std. Error t value Pr(>|t|)
(Intercept) -22273.90 22809.43 -0.98 0.34
Val 786.09 325.46 2.42 0.02
Name Value
F-statistic 5.83
df 1, 32
R2 0.15
R2-adj 0.13
Catch vs tke summer J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 107151.5 26995.45 3.97 0.00
Val -254762.9 91851.25 -2.77 0.01
Name Value
F-statistic 7.69
df 1, 32
R2 0.19
R2-adj 0.17
Catch vs total wind speed summer J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 50583.43 6758.57 7.48 0.00
Val -11754.86 4153.25 -2.83 0.01
Name Value
F-statistic 8.01
df 1, 32
R2 0.2
R2-adj 0.18
Fmort vs hcly summer m2/sec2
Estimate Std. Error t value Pr(>|t|)
(Intercept) -0.10 0.15 -0.65 0.52
Val 0.01 0.00 2.97 0.01
Name Value
F-statistic 8.84
df 1, 32
R2 0.22
R2-adj 0.19
Fmort vs tke summer J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.93 0.18 5.09 0
Val -1.96 0.62 -3.18 0
Name Value
F-statistic 10.08
df 1, 32
R2 0.24
R2-adj 0.22
Fmort vs total wind speed summer J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.46 0.05 9.55 0.00
Val -0.07 0.03 -2.41 0.02
Name Value
F-statistic 5.81
df 1, 32
R2 0.15
R2-adj 0.13

2.2.13 Fall wind speed

Figures

Regression statistics

Recruitment vs vwnd fall J/kg
Estimate Std. Error t value Pr(>|t|)
(Intercept) 57747.24 6055.71 9.54 0.00
Val 8618.42 4186.19 2.06 0.05
Name Value
F-statistic 4.24
df 1, 31
R2 0.12
R2-adj 0.09

2.2.14 Gulf Stream Index

Figures

Regression statistics

Catch vs gulf stream index latitude anomaly
Estimate Std. Error t value Pr(>|t|)
(Intercept) 26378.28 826.75 31.91 0
Val -4143.45 1165.85 -3.55 0
Name Value
F-statistic 12.63
df 1, 24
R2 0.34
R2-adj 0.32
Abundance vs gulf stream index latitude anomaly
Estimate Std. Error t value Pr(>|t|)
(Intercept) 101326.00 3012.08 33.64 0.00
Val -10612.06 4247.52 -2.50 0.02
Name Value
F-statistic 6.24
df 1, 24
R2 0.21
R2-adj 0.17

2.2.15 North Atlantic Oscillation

Figures

Regression statistics

Abundance vs north atlantic oscillation unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 108751.36 4425.43 24.57 0.00
Val -3833.18 1853.57 -2.07 0.05
Name Value
F-statistic 4.28
df 1, 32
R2 0.12
R2-adj 0.09

2.2.16 Chlorophyll

Figures

Regression statistics

[1] “No statistically significant results”

2.3 Trophic indicators

2.3.1 Spring zooplankton abundance by species

Figures

Regression statistics

Catch vs centropages zoo spring log N m^-3
Estimate Std. Error t value Pr(>|t|)
(Intercept) 135087.98 42994.83 3.14 0.00
Val -24919.68 10482.53 -2.38 0.03
Name Value
F-statistic 5.65
df 1, 26
R2 0.18
R2-adj 0.15
Catch vs temora zoo spring log N m^-3
Estimate Std. Error t value Pr(>|t|)
(Intercept) 49100.27 7892.33 6.22 0.00
Val -7310.29 3392.88 -2.15 0.04
Name Value
F-statistic 4.64
df 1, 26
R2 0.15
R2-adj 0.12
Fmort vs centropages zoo spring log N m^-3
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.89 0.25 3.50 0.00
Val -0.13 0.06 -2.15 0.04
Name Value
F-statistic 4.6
df 1, 26
R2 0.15
R2-adj 0.12
Abundance vs temora zoo spring log N m^-3
Estimate Std. Error t value Pr(>|t|)
(Intercept) 141683.71 13312.73 10.64 0.00
Val -14869.74 5723.09 -2.60 0.02
Name Value
F-statistic 6.75
df 1, 26
R2 0.21
R2-adj 0.18

2.3.2 Fall zooplankton abundance by species

Figures

Regression statistics

Fmort vs pseudocalanus zoo fall log N m^-3
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.25 0.03 9.01 0
Val 0.07 0.02 3.71 0
Name Value
F-statistic 13.77
df 1, 28
R2 0.33
R2-adj 0.31

2.3.3 Zooplankton abundance by group

Figures

Regression statistics

Catch vs Euphausiacea Absolute Number of Individuals
Estimate Std. Error t value Pr(>|t|)
(Intercept) 41295.74 4445.28 9.29 0.00
Val 0.00 0.00 -2.31 0.03
Name Value
F-statistic 5.33
df 1, 32
R2 0.14
R2-adj 0.12
Fmort vs SmallCalanoida Absolute Number of Individuals
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.29 0.03 8.86 0.00
Val 0.00 0.00 2.06 0.05
Name Value
F-statistic 4.26
df 1, 32
R2 0.12
R2-adj 0.09
Abundance vs Euphausiacea Absolute Number of Individuals
Estimate Std. Error t value Pr(>|t|)
(Intercept) 122223.5 7570.34 16.15 0.00
Val 0.0 0.00 -2.63 0.01
Name Value
F-statistic 6.9
df 1, 32
R2 0.18
R2-adj 0.15
Abundance vs SmallCalanoida Absolute Number of Individuals
Estimate Std. Error t value Pr(>|t|)
(Intercept) 129372.4 7291.97 17.74 0
Val 0.0 0.00 -3.81 0
Name Value
F-statistic 14.5
df 1, 32
R2 0.31
R2-adj 0.29

2.3.4 Abundance of Calanus CV and adults

Figures

Regression statistics

Abundance vs Calanus CV and adult
Estimate Std. Error t value Pr(>|t|)
(Intercept) 88057.70 7550.32 11.66 0.00
Val 1.04 0.38 2.75 0.01
Name Value
F-statistic 7.58
df 1, 31
R2 0.2
R2-adj 0.17

2.3.5 Zooplankton abundance anomaly

Figures

Regression statistics

Fmort vs small Abundance anomaly unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.35 0.02 21.80 0.00
Val 0.11 0.05 2.22 0.03
Name Value
F-statistic 4.93
df 1, 32
R2 0.13
R2-adj 0.11
Abundance vs small Abundance anomaly unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 104623.70 4103.24 25.50 0.00
Val -25087.12 12187.37 -2.06 0.05
Name Value
F-statistic 4.24
df 1, 32
R2 0.12
R2-adj 0.09

2.3.6 Zooplankton diversity index

Figures

Regression statistics

Fmort vs Zoo_Shannon-Wiener_Diversity_index Unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.74 0.14 5.27 0.00
Val -0.16 0.06 -2.80 0.01
Name Value
F-statistic 7.81
df 1, 32
R2 0.2
R2-adj 0.17

2.3.7 Small/large copepod anomaly

Figures

Regression statistics

Abundance vs Sm-Lg copepod anom Abundance anomaly unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 105639.1 3857.85 27.38 0.00
Val -21094.0 7106.17 -2.97 0.01
Name Value
F-statistic 8.81
df 1, 32
R2 0.22
R2-adj 0.19

2.3.8 Spring ichthyoplankton diversity

Figures

Regression statistics

Fmort vs Number_Of_Species_Caught Unitless
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.07 0.04 1.65 0.14
Val 0.01 0.00 5.06 0.00
Name Value
F-statistic 25.56
df 1, 8
R2 0.76
R2-adj 0.73

2.3.9 Fall ichthyoplankton diversity

Figures

Regression statistics

[1] “No statistically significant results”

2.3.10 Forage fish abundance

Figures

Regression statistics

Catch vs Forage_Lower
Estimate Std. Error t value Pr(>|t|)
(Intercept) 25921.79 1388.95 18.66 0.00
Val -6375.72 2958.52 -2.16 0.05
Name Value
F-statistic 4.64
df 1, 17
R2 0.21
R2-adj 0.17
Catch vs Forage_Mean
Estimate Std. Error t value Pr(>|t|)
(Intercept) 27454.46 1141.77 24.05 0.00
Val -6821.80 2881.81 -2.37 0.03
Name Value
F-statistic 5.6
df 1, 17
R2 0.25
R2-adj 0.2
Catch vs Forage_Upper
Estimate Std. Error t value Pr(>|t|)
(Intercept) 29167.23 1285.33 22.69 0.00
Val -7113.19 2782.99 -2.56 0.02
Name Value
F-statistic 6.53
df 1, 17
R2 0.28
R2-adj 0.24
Abundance vs Forage_Upper
Estimate Std. Error t value Pr(>|t|)
(Intercept) 112357.21 3142.75 35.75 0.00
Val -14739.45 6804.69 -2.17 0.04
Name Value
F-statistic 4.69
df 1, 17
R2 0.22
R2-adj 0.17

2.3.11 Species distribution

Figures

Regression statistics

Catch vs along-shelf distance km
Estimate Std. Error t value Pr(>|t|)
(Intercept) 286566.45 73110.2 3.92 0
Val -301.72 86.8 -3.48 0
Name Value
F-statistic 12.08
df 1, 32
R2 0.27
R2-adj 0.25
Catch vs Latitude degreesN
Estimate Std. Error t value Pr(>|t|)
(Intercept) 1748889.20 512764.27 3.41 0
Val -42323.45 12644.11 -3.35 0
Name Value
F-statistic 11.2
df 1, 32
R2 0.26
R2-adj 0.24
Catch vs Longitude degreesW
Estimate Std. Error t value Pr(>|t|)
(Intercept) -2650990.32 793028.25 -3.34 0
Val -38010.96 11232.85 -3.38 0
Name Value
F-statistic 11.45
df 1, 32
R2 0.26
R2-adj 0.24
Fmort vs along-shelf distance km
Estimate Std. Error t value Pr(>|t|)
(Intercept) 1.87 0.53 3.52 0.00
Val 0.00 0.00 -2.86 0.01
Name Value
F-statistic 8.18
df 1, 32
R2 0.2
R2-adj 0.18
Fmort vs Latitude degreesN
Estimate Std. Error t value Pr(>|t|)
(Intercept) 9.59 3.79 2.53 0.02
Val -0.23 0.09 -2.44 0.02
Name Value
F-statistic 5.94
df 1, 32
R2 0.16
R2-adj 0.13
Fmort vs Longitude degreesW
Estimate Std. Error t value Pr(>|t|)
(Intercept) -17.47 5.58 -3.13 0
Val -0.25 0.08 -3.20 0
Name Value
F-statistic 10.21
df 1, 32
R2 0.24
R2-adj 0.22

2.4 Larvae and YOY indicators

2.4.1 Recruitment

Figures

Regression statistics

Recruitment vs Recruitment
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0 0 6.180000e+00 0
Val 1 0 9.942338e+15 0
Name Value
F-statistic 9.88500805510043e+31
df 1, 32
R2 1
R2-adj 1

2.4.2 Larval growth

2.5 Juvenile indicators

2.5.1 Length-age curves

2.5.2 Condition

2.5.3 CPUE

2.6 Adult indicators

2.6.1 Size of spawning stock

Figures

Regression statistics

Catch vs Abundance
Estimate Std. Error t value Pr(>|t|)
(Intercept) -6959.50 8331.64 -0.84 0.41
Val 0.38 0.08 4.87 0.00
Name Value
F-statistic 23.7
df 1, 32
R2 0.43
R2-adj 0.41
Abundance vs Abundance
Estimate Std. Error t value Pr(>|t|)
(Intercept) 0 0 -1.288000e+01 0
Val 1 0 6.975294e+16 0
Name Value
F-statistic 4.86547320610076e+33
df 1, 32
R2 1
R2-adj 1

2.6.2 Mean age of spawning stock

2.6.3 Age distribution

2.6.4 Length-age curves

2.6.5 Condition

Figures

Regression statistics

[1] “No statistically significant results”

2.6.6 Stomach fullness

Figures

Regression statistics

[1] “No statistically significant results”

2.6.7 Center of gravity and area occupied

2.7 Socioeconomic indicators

2.7.1 CPUE by catch strategy